Check online how many sims are issued against your CNIC number this is really important Pakistan Telecommunication Authority (PTA) has developed a SIM (Subscriber Identity Module) information system to address associated risks on security and to ensure subscription regulations in cellular sector. The objective of the project is to provide a consumer-based facility to mobile subscribers in Pakistan by which they would be able to find out the total number of SIM(s) registered against their respective CNIC number with each mobile operator.
Here we give you link where you click and get the that block where you can put your CNIC number after this you can get the window where all details are given you if you have identified number of Sim that are not use under you custardy than you have option go to related telecom company and block that sim that issue on you CNIC.
So on below given link you can check How many sim issued against your CNIC:
The Pakistan Telecommunication Ordinance 1994, established the primary regulatory framework for the telecommunication industry including the establishment of an authority. Thereafter, Telecommunication Act no XVII was promulgated in 1996 that aimed to reorganize the telecom sector of Pakistan. Under Telecom Reorganization Act 1996, Pakistan Telecommunication Authority (PTA) was established to regulate the establishment, operation and maintenance of telecommunication systems, and the provision of telecom services. PTA has its headquarters at Islamabad and zonal offices located at Karachi, Lahore, Peshawar, Quetta, Rawalpindi and Muzaffarabad.